beta-Catenin expression in the bone marrow microenvironment is required for long-term maintenance of primitive hematopoietic cells.

beta-Catenin expression in the bone marrow microenvironment is required for long-term maintenance of primitive hematopoietic cells.
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DOI:
10.1002/stem.32
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发表时间:
2009-05
期刊:
影响因子:
5.2
通讯作者:
Bodine, David M.
Bodine, David M.
中科院分区:
医学2区
文献类型:
--
作者:
Nemeth, Michael J.;Mak, Kingston K.;Yang, Yingzi;Bodine, David M.

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Hematopoiesis is dependent upon the bone marrow microenvironment, which is comprised of multiple mesenchymal cell types, including fibroblasts, endothelial cells, osteoblasts and stroma progenitors. The canonical Wnt signaling pathway, which relies on the β-catenin protein to mediate its signal, is necessary for the normal development of mesenchymal tissue. We hypothesized that canonical Wnt signaling regulates the cellular composition and function of the bone marrow microenvironment. We observed that a β-catenin-deficient bone marrow microenvironment maintained hematopoietic stem cells but exhibited a decreased capacity to support primitive hematopoietic cells. These results correlated with decreased numbers of osteoblasts and with decreased production of basic fibroblast growth factor, stem cell factor, and vascular cell adhesion molecule-1. From these data, we propose a model in which β-catenin in the microenvironment is required non-cell autonomously for long-term maintenance of hematopoietic progenitors.
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